diff --git a/mainsettingsdialog.cpp b/mainsettingsdialog.cpp
index 2da44ed..7cd1230 100644
--- a/mainsettingsdialog.cpp
+++ b/mainsettingsdialog.cpp
@@ -48,6 +48,7 @@ MainSettingsDialog::MainSettingsDialog(QWidget *parent) :
     ui->cbLoadConnections->setChecked(settings.value("Main/SaveRestoreConnections", false).toBool());
 
     ui->spinFontSize->setValue(settings.value("Main/FontSize", ui->cbDisplayHex->font().pointSize()).toUInt());
+    ui->cbFontFixedWidth->setChecked(settings.value("Main/FontFixedWidth", false).toBool());
 
     bool secondsMode = settings.value("Main/TimeSeconds", false).toBool();
     bool clockMode = settings.value("Main/TimeClock", false).toBool();
@@ -132,6 +133,7 @@ MainSettingsDialog::MainSettingsDialog(QWidget *parent) :
     connect(ui->cbHexGraphInfo, SIGNAL(toggled(bool)), this, SLOT(updateSettings()));
     connect(ui->cbIgnoreDBCColors, SIGNAL(toggled(bool)), this, SLOT(updateSettings()));
     connect(ui->spinMaximumFrames, SIGNAL(valueChanged(int)), this, SLOT(updateSettings()));
+    connect(ui->cbFontFixedWidth, SIGNAL(toggled(bool)), this, SLOT(updateSettings()));
 
     installEventFilter(this);
 }
@@ -199,6 +201,7 @@ void MainSettingsDialog::updateSettings()
     settings.setValue("Main/FilterLabeling", ui->cbFilterLabeling->isChecked());
     settings.setValue("Main/IgnoreDBCColors", ui->cbIgnoreDBCColors->isChecked());
     settings.setValue("Main/MaximumFrames", ui->spinMaximumFrames->value());
+    settings.setValue("Main/FontFixedWidth", ui->cbFontFixedWidth->isChecked());
 
     settings.sync();
     emit updatedSettings();
diff --git a/mainwindow.cpp b/mainwindow.cpp
index e1184f1..e84da30 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -57,12 +57,18 @@ MainWindow::MainWindow(QWidget *parent) :
     verticalHeader->setSectionResizeMode(QHeaderView::Fixed);
     QSettings settings;
     int fontSize = settings.value("Main/FontSize", 9).toUInt();
-    QFont sysFont = QFontDatabase::systemFont(QFontDatabase::FixedFont); //get default font
+    QFont sysFont;
+    if(settings.value("Main/FontFixedWidth", false).toBool())
+        sysFont = QFontDatabase::systemFont(QFontDatabase::FixedFont); //get default fixed width font
+    else
+        sysFont = QFont();  //get default font
     sysFont.setPointSize(fontSize);
     verticalHeader->setDefaultSectionSize(sysFont.pixelSize());
+    verticalHeader->setFont(QFont());
     ui->canFramesView->setFont(sysFont);
 
     QHeaderView *HorzHdr = ui->canFramesView->horizontalHeader();
+    HorzHdr->setFont(QFont());
     HorzHdr->setStretchLastSection(true); //causes the data column to automatically fill the tableview
     connect(HorzHdr, SIGNAL(sectionClicked(int)), this, SLOT(headerClicked(int)));
 
diff --git a/signalviewerwindow.cpp b/signalviewerwindow.cpp
index 7d20531..c061074 100644
--- a/signalviewerwindow.cpp
+++ b/signalviewerwindow.cpp
@@ -21,8 +21,23 @@ SignalViewerWindow::SignalViewerWindow(const QVector<CANFrame> *frames, QWidget
     ui->tableViewer->setHorizontalHeaderLabels(headers);
     ui->tableViewer->setColumnWidth(0, 100);
     ui->tableViewer->setColumnWidth(1, 150);
+
+    QSettings settings;
+    QFont sysFont;
+    int fontSize = settings.value("Main/FontSize", 9).toUInt();
+    if(settings.value("Main/FontFixedWidth", false).toBool())
+        sysFont = QFontDatabase::systemFont(QFontDatabase::FixedFont); //get default fixed width font
+    else
+        sysFont = QFont();  //get default font
+    sysFont.setPointSize(fontSize);
+    ui->tableViewer->setFont(sysFont);
+
     QHeaderView *HorzHdr = ui->tableViewer->horizontalHeader();
     HorzHdr->setStretchLastSection(true); //causes the data column to automatically fill the tableview
+    HorzHdr->setFont(QFont());
+
+    QHeaderView *verticalHeader = ui->tableViewer->verticalHeader();
+    verticalHeader->setFont(QFont());
 
     dbcHandler = DBCHandler::getReference();
 
diff --git a/ui/mainsettingsdialog.ui b/ui/mainsettingsdialog.ui
index d119b08..cb61d4d 100644
--- a/ui/mainsettingsdialog.ui
+++ b/ui/mainsettingsdialog.ui
@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>965</width>
-    <height>678</height>
+    <height>713</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -191,9 +191,23 @@
         <item>
          <widget class="QGroupBox" name="groupBox_7">
           <property name="title">
-           <string>Font Size</string>
+           <string>Font</string>
           </property>
           <layout class="QVBoxLayout" name="verticalLayout_8">
+           <item>
+            <widget class="QCheckBox" name="cbFontFixedWidth">
+             <property name="text">
+              <string>Use fixed-width font in tables</string>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QLabel" name="label_11">
+             <property name="text">
+              <string>Size</string>
+             </property>
+            </widget>
+           </item>
            <item>
             <widget class="QSpinBox" name="spinFontSize">
              <property name="minimum">